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Random float number generation
...ften done like this:
srand (static_cast <unsigned> (time(0)));
In order to call rand or srand you must #include <cstdlib>.
In order to call time, you must #include <ctime>.
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Calculate the median of a billion numbers
...ion first[*]. It writes its data back to the control machine in increasing order as soon as it can (using asynchronous IO so as to continue sorting, and probably with Nagle on: experiment a bit).
The control machine performs a 99-way merge on the data as it arrives, but discards the merged data, ju...
How do I tar a directory of files and folders without including the directory itself?
...rocessed. Consider the following command: tar --create --file=foo.tar -C /etc passwd hosts -C /lib libc.a" apl.jhu.edu/Misc/Unix-info/tar/tar_65.html I always try tar -czvf my_directory.tar.gz * -C my_directory and that does not work. -C location is important! Damn tar...
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Setting up foreign keys in phpMyAdmin?
... "Structure" tab, just below the tab row that shows "Browse", "Structure", etc.
– Astitva Srivastava
Apr 2 '18 at 18:42
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What is non-blocking or asynchronous I/O in Node.js?
...to memory and processing time for a thread that isn't doing anything.
In order to cater other requests while that thread has stalled depends on your software. What most server software do is spawn more threads to cater the additional requests. This requires more memory consumed and more processing...
How to run travis-ci locally
...le change to .travis.yml and every little change I make to the source in order to run the build. With jenkins you can download jenkins and run locally. Does travis offer something like this?
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How can I update npm on Windows?
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Close /shutdown other consoles .. command prompts and PowerShell windows, etc. Even if you're using npm in a command prompt, close it.
npm -v (3.10.8)
node -v ( v6.6.0)
DONE. I'm at the version that I want.
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How to sort with lambda in Python
... ^^^^
On Python 2.x, the sorted function takes its arguments in this order:
sorted(iterable, cmp=None, key=None, reverse=False)
so without the key=, the function you pass in will be considered a cmp function which takes 2 arguments.
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Using Laravel Homestead: 'no input file specified'
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ssh vagrant@127.0.0.1 -p 2222
Then change your nginx config:
sudo vi /etc/nginx/sites-enabled/homestead.app
Edit the correct URI to the root on line 3 to this with the new folder name:
root "/Users/MYUSERNAME/Code/exampleproject/public";
Restart Nginx
sudo service nginx reload
Reload the...
Add EBS to Ubuntu EC2 Instance
...ata that was on this volume previously.
Mount file system (with update to /etc/fstab so it stays mounted on reboot):
sudo mkdir -m 000 /vol
echo "/dev/xvdf /vol auto noatime 0 0" | sudo tee -a /etc/fstab
sudo mount /vol
s...